You have a point about the space crusade’s combat, and I’ve try too to find a relation between the two combat systems given that I keep the HQ’s defense scores and life points (1 D for Grechins, 2 D for the orcs, etc). I hope it helps... I believe that the attack dices should look like the following:
1 white (SC) = 1 combat (HQ)
2 whites (SC) = 2 combat (HQ)
1 red (SC) = 2 combat (HQ)
1 red + 1 white (SC) = 2 combat and one reroll if he wants to (HQ)
2 reds (SC) = 3 combat (HQ)
2 reds+1 white (SC) = 3 combat and one reroll (HQ)
2 reds+2 whites (SC) = 3 combat and two rerolls (HQ)
3 reds (SC) = 4 combat (HQ)
So, the weapons of space crusade, its expansions and the white dwarf magazine have the following combat dices:
Bolter-Bolt Pistol-Power Sword-Shuriken Catapult: 2 whites (SC). The basic weapon of heroes (marines) it should be 2 combat (HQ)
Las-Cannon: 1 red (SC). A weapon that hits three times with 1 red each should be like 2 combat dices each time (HQ)
Shuriken Cannon-Terminator’s Power Fist-Terminator’s Storm Bolter: 1 red + 1 white (SC). It should be like 2 combat dices each time rerolling one dice if he wants to (HQ)
Heavy Bolter-Assault Cannon-Missile Launcher-Plasma Gun-Power Axe-Power Glove-Tarantula-Terminator’s Thunder Hammer-Terminator’s Heavy Flamer- Terminator Commander’s
Storm Bolter-Terminator’s Power Sword: 2 red (SC). The basics heavy weapons should be 3 combat dices (HQ)
Terminator’s Assault Cannon: 2 reds+1 white (SC). It should be 3 combat dices with one reroll (HQ)
Terminator’s Lightning Claws: 2 reds + 2 whites (SC). It could be 3 combat dices with two rerolls (HQ)
Fusion Gun-Conversion Beam: 3 reds (SC). The extremely lethal weapons should be 4 combat dices (HQ)
With that in mind, a typical group of four marines and one commander will look like this:
1# Marine with bolter: Attack 2(2), Defense 2
2# Marine with assault cannon: Attack 3(2), Defense 2
3# Marine with missile launcher: Attack 3(2), Defense 2
4# Marine with plasma gun: Attack 3(2), Defense 2
5# Commander with Power Axe and Bolt Pistol: Attack 3(2), Defense 2
Though it looks like 4 Barbarians and 1 Elf if you give them the right Life Points I think you can make it work.
I want to hear your opinion...